> Right, I think you have to *clear* the auto-negotiate mode and set the
> media to what the NWAY cycle resulted in.  You restart on link failure
> by taking an interrupt when the link goes away (the link status should
> come in on one of the GPIO pins).

That would be a more interesting theory were it not for the fact that
the 21143 completely contradicts it.  The chip itself handles
restarting auto-negotiation on a link transition, AFAICT.